Sarudza ku: Dual-clutch gearbox zvigadzirwa zvakanyorova mbiri-clutch giya bhokisi, iyo inotsigira goko rine clutch uye gearbox goko, iwo magomba maviri anogadzirwa neakanyanya kudzvanya nzira yekukanda, mukuita kwekugadzirwa kwechigadzirwa uye kugadzirwa kwakasangana nekuoma kwemhando yekuvandudza maitiro, isina yakazara yakazara inokodzera chiyero neinenge 60% 95% pakupera kweiyo nhanho yemhando yekukwidza.
Wet dual-clutch transmission, iyo inoshandisa inovandudza cascade gear set, electro-mechanical shift drive system uye itsva electro-hydraulic clutch actuator.Iyo shell isina chinhu inogadzirwa neyekumanikidza kukanda aluminium alloy, ine hunhu hwehuremu huremu uye simba rakawanda.Kune hydraulic pombi, yekuzora mvura, pombi inotonhorera uye yekunze kutonhora sisitimu mubhokisi regiya, iyo inoisa kumberi kwepamusoro zvinodiwa pane yakazara mechanic kuita uye yekuisa chisimbiso kuita kwegoko.Iri bepa rinotsanangura maitiro ekugadzirisa matambudziko emhando akadai seganda deformation, mweya shrinkage gomba uye leakage pass rate iyo inokanganisa kupasa zvakanyanya.
1,Solution ye deformation dambudziko
Mufananidzo 1 (a) pazasi，Iyo giya bhokisi rinoumbwa neakakwira-kumanikidza cast aluminium alloy gearbox dzimba uye clutch imba.Iyo inoshandiswa ndeye ADC12, uye yakakosha madziro ukobvu hunosvika 3.5mm.Iyo gearbox shell inoratidzwa mumufananidzo 1 (b).Saizi yekutanga ndeye 485mm (kureba) × 370mm (hupamhi) × 212mm (kureba), vhoriyamu i2481.5mm3, nzvimbo yakarongwa i134903mm2, uye huremu hwemambure hunosvika 6.7kg.Icho chikamu chakaonda-chakakomberedzwa chakadzika-cavity.Tichifunga nezvekugadzira uye kugadzirisa tekinoroji ye mold, kuvimbika kwekuumbwa kwechigadzirwa uye maitiro ekugadzira, mold yakarongwa sezvakaratidzwa muMufananidzo 1 (c), iyo inoumbwa nemapoka matatu emasiraidhi, anofambisa mold (munzira yekunze mhango) uye yakagadzika mold (munzira yemukati memukati), uye iyo yekupisa inodzika inogadzirwa kusvika 51%.
Chaizvoizvo, mukuita kwekutanga bvunzo yekukanda kufa, zvakaonekwa kuti saizi yechinzvimbo chechigadzirwa chakagadzirwa nekufa yakange yakanyatsosiyana nezvinodiwa zvekugadzira (dzimwe nzvimbo dzaive pamusoro pe30% kubva), asi saizi yekuumbwa yaive yakakodzera uye shrinkage rate kana ichienzaniswa nehukuru chaihwo hwaienderanawo nemutemo we shrinkage.Kuti uwane chikonzero chechinetso, 3D scanning yeganda remuviri uye theoretical 3D yakashandiswa kuenzanisa nekuongorora, sezvakaratidzwa mumufananidzo 1 (d).Zvakaonekwa kuti hwaro Positioning nzvimbo ye blank akanga akaremara, uye deformation uwandu akanga 2.39mm munzvimbo B uye 0.74mm munharaunda C. Nokuti chigadzirwa inobva convex pfungwa isina chinhu A, B, C nokuda kwaitevera processing Positioning bhenji uye kuyerwa bhenji, deformation ichi chinotungamira muchiyero, imwe nzvimbo yeB kurongeka kweiyo C.
Kuongorora kwezvikonzero zvedambudziko iri:
① High pressure casting die design musimboti ndechimwe chezvigadzirwa mushure mekudhonzwa, zvichipa chimiro kune chigadzirwa pane inoshanduka modhi, inoda mhedzisiro pane inoshanduka modhi yepakeji simba rakakura kupfuura masimba anoshanda pane yakagadzika mold bag yakasimba, nekuda kweiyo yakadzika mhango yakakosha zvigadzirwa panguva imwe chete, yakadzika mhango mukati meiyo cores pane yakagadziriswa mold uye kunze kwegomba rakaumbwa pamusoro peiyo inofambisa chikamu chinozonetsekana nekuumbwa kwechigadzirwa;
②Kune masiraidhi kuruboshwe, kuzasi uye kurudyi nzira dze mold, ayo anoita basa rekubatsira mukurovera kusati kwagadzirwa.Simba rerutsigiro diki riri kumusoro B, uye chimiro chese ndechekudzika mugomba panguva yekudziya kwekushisa.Izvo zvikonzero zviviri zviri pamusoro apa zvinotungamira kune yakakura deformation paB, inoteverwa naC.
Chirongwa chekuvandudza chekugadzirisa dambudziko iri ndechekuwedzera yakagadziriswa kufa ejection mechanism Mufananidzo 1 (e) pane yakagadziriswa inofa pamusoro.PaB yakawedzera 6 set mold plunger, ichiwedzera maviri akagadzika mold plunger muC, yakagadziriswa pini tsvimbo ndeyekutsamira pane reset peak, kana ichifamba mold clamping ndege isa reset lever inoidzvanya kuita muforoma, mold automatic die pressure inonyangarika, kuseri kweplate spring and then push the top peak, tora danho rekuona kusimudzira kugadzirwa kwezvigadzirwa, saka deformation inobuda.
Mushure mekugadzirisa mold, iyo deformation deformation inoderedzwa zvinobudirira.Sezvinoratidzwa muFIG.1 (f), deformations paB neC inonyatsodzorwa.Point B ndeye +0.22mm uye point C iri +0.12, iyo inosangana nezvinodiwa zveiyo blank contour ye0.7mm uye kuwana kugadzirwa kwakawanda.
2, Kugadziriswa kwegomba shrinkage gomba uye kuvuza
Sezvinozivikanwa kune vese, high pressure casting inzira yekugadzira iyo iyo simbi yemvura inokurumidza kuzadzwa mukati mesimbi mold cavity nekuisa imwe kudzvanywa uye inoomesa nekukurumidza pasi pekumanikidzwa kuwana kukanda.Nekudaro, zvichienderana nehunhu hwekugadzirwa kwechigadzirwa uye kufa kukanda maitiro, kuchine dzimwe nzvimbo dzemajoini anopisa kana ane njodzi huru yemhepo shrinkage maburi muchigadzirwa, izvo zvinoenderana ne:
(1) Kudzvanya kunoshandisa kudzvanya kudzvanya simbi yemvura mugomba nekumhanya kukuru.Iyo gasi mukamuri yekumanikidza kana mold cavity haigone kuburitswa zvachose.Aya magasi anobatanidzwa musimbi yemvura uye anozopedzisira avepo mukukanda nenzira yemapores.
(2) Kunyungudika kwegasi mumvura aruminiyamu uye yakasimba aluminium alloy yakasiyana.Mukuita kusimba, gasi rinodzivirirwa nemvura.
(3) Iyo simbi yemvura inoomesa nekukurumidza mugomba, uye kana pasina kudya kunoshanda, zvimwe zvikamu zvekukanda zvinoburitsa shrinkage cavity kana shrinkage porosity.
Tora zvigadzirwa zveDPT zvakabudirira kupinda mumuenzaniso wekushandisa uye chidimbu chekugadzira batch semuenzaniso (ona Mufananidzo 2) : Chiyero chekuremara kwegomba rekutanga remhepo shrinkage yechigadzirwa chakaverengwa, uye chepamusoro chaiva 12.17%, pakati peiyo gomba remhepo rinoputika rakakura kudarika 3.5mm rakaita 15.71 hole uye 5. dzakasvika 42.93 %.Aya maburi emhepo aidzika zvakanyanya mune mamwe maburi ane shinda uye nzvimbo dzekuvharira.Izvi zvinokanganisa zvinokanganisa simba rekubatanidza bhoti, kusimba kwepamusoro uye zvimwe zvinoshanda zvinodiwa zvezvimedu.
Kugadzirisa matambudziko aya, nzira huru ndedzinotevera:
2.1SPOT COOLING SYSTEM
Inokodzera kune imwechete yakadzika mhango zvikamu uye hombe dzepakati zvikamu.Iyo inoumba chikamu chezvivakwa izvi ine mashoma mashoma cavities kana yakadzika mhango chikamu chekukweva kwepakati, nezvimwewo, uye mashoma mold anoputirwa neyakakura yakawanda yealuminiyamu yemvura, izvo zviri nyore kukonzera kupisa kwemuumbi, zvichikonzera kuomesa mold, kupisa kupisa uye kumwe kukanganisa.Naizvozvo, zvinodikanwa kumanikidza kutonhora mvura inotonhorera panzvimbo yekupfuura yeyakadzika cavity mold.Chikamu chemukati chemukati chine dhayamita yakakura kupfuura 4mm inotonhodzwa ne 1.0-1.5mpa yakakwirira-yakanyanyisa mvura, kuitira kuti ive nechokwadi chokuti mvura inotonhorera inotonhora uye inopisa, uye zvisikwa zvakapoteredza zvepakati zvinogona kutanga zvakasimba uye kuumba dense layer, kuitira kuti kuderedza shrinkage uye porosity tendency.
Sezvinoratidzwa mumufananidzo 3, yakasanganiswa nenhamba yekuongorora data yekufananidza uye chaiyo zvigadzirwa, yekupedzisira poindi yekutonhodza marongero yakagadziridzwa, uye yakanyanya-kudzvanywa nzvimbo inotonhorera sezvakaratidzwa muMufananidzo 3 (d) yakaiswa pane mold, iyo yakanyatso kudzora kupisa kwechigadzirwa munzvimbo inopisa yakabatana, yakaziva kutevedzana kwekusimba kwezvigadzirwa, zvakadzikamisa maburi akakodzera, uye kudzora chiyero.
2.2Local extrusion
Kana hukobvu hwemadziro echigadzirwa chekugadzira dhizaini isina kuenzana kana paine mahombe anopisa anopisa mune dzimwe nzvimbo, shrinkage maburi anowanzo kuoneka muchikamu chekupedzisira chakasimba, sezvakaratidzwa muFIG.4 (C) pazasi.Iyo shrinkage maburi mune izvi zvigadzirwa haigone kudzivirirwa nekufa casting process uye kuwedzera nzira yekutonhora.Panguva ino, extrusion yemunharaunda inogona kushandiswa kugadzirisa dambudziko.Chikamu chekumanikidza chimiro dhayagiramu sezvakaratidzwa mumufananidzo 4 (a), iyo yakaiswa yakananga muhumburumbira, mushure mesimbi yakanyungudutswa ichizadza muforoma uye yakaomeswa zvisati zvaitika, kwete zvachose mune semi-yakasimba simbi yemvura mugomba, iyo pakupedzisira kugadzika gobvu madziro ne extrusion tsvimbo kumanikidza kudyisa kudzikisa kana kubvisa kwayo shrinkage gomba rakakandwa kuwana hurema hwepamusoro hwekufa.
2.3The yechipiri extrusion
Chikamu chechipiri che extrusion ndechekuisa kaviri sitiroko cylinder.Sitiroko yekutanga inopedzisa kuumbwa kwechikamu chekutanga gomba rekukanda, uye kana iyo aluminium yemvura yakatenderedza musimboti yakasimbiswa zvishoma nezvishoma, yechipiri extrusion chiitiko chinotangwa, uye kaviri mhedzisiro yepre-casting uye extrusion inozoitika.Tora iyo giya bhokisi dzimba semuenzaniso, chiyero chakakodzera cheyedzo-yakasimba gasi bvunzo yegiya bhokisi rekugara muchikamu chekutanga chepurojekiti iri pasi pe70%.Kugovaniswa kwezvikamu zvekuvuza kunonyanya kupindirana kwemafuta ndima 1# uye mafuta ndima 4# (denderedzwa dzvuku mumufananidzo 5) sezvaratidzwa pazasi.
2.4KUKANDA RUNNER SYSTEM
Iyo yekukanda sisitimu yesimbi die casting mold inzira inozadza gomba rekufa casting modhi ine yakanyungudutswa simbi yemvura mukamuri yekutsikirira yemuchina wekukanda kufa pasi pemamiriro ekupisa kwakanyanya, kudzvanywa uye kumhanya kwakanyanya.Inosanganisira mumhanyi akatwasuka, mumhanyi wemuchinjikwa, mumhanyi wemukati uye anofashukira exhaust system.Ivo vanotungamirwa mukuita kweiyo yemvura simbi yekuzadza mhango, iyo inoyerera nyika, velocity uye kudzvanywa kweyemvura simbi kutamiswa, mhedzisiro yekupopota uye kufa mold inotamba yakakosha muzvinhu zvakadai seyekupisa kuenzana mamiriro ekutonga uye mutemo, saka, gating system inosarudzwa kufa yekukanda pamusoro pemhando pamwe chete nechinhu chakakosha chemukati meiyo microstructure mamiriro.Dhizaini uye kupedzisa kwekudira sisitimu inofanira kunge yakavakirwa pamubatanidzwa wedzidziso uye maitiro.
2.5ProcessOoptimization
Die casting process ibasa rinopisa rinosanganisa uye rinoshandisa muchina wekukanda kufa, kufa kwekufa uye simbi yemvura zvinoenderana neyakafanosarudzwa maitiro maitiro uye maparamendi ekugadzirisa, uye inowana iyo yekukanda kufa nerubatsiro rwemagetsi drive.Zvinotora marudzi ese ezvinhu mukufunga, Zvakadai sekumanikidza (kusanganisira jekiseni simba, jekiseni chaiyo kumanikidza, simba rekuwedzera, mold kukiya simba), jekiseni kumhanya (kusanganisira punch kumhanya, yemukati gedhi kumhanya, etc.), Kuzadza kumhanya, nezvimwewo), tembiricha dzakasiyana (kunyunguduka tembiricha yesimbi yemvura, tembiricha yekukanda, kupisa kwekuumbwa, etc. mwero, tembiricha gradient, etc.), kukanda zvivakwa uye zvinopisa zvimiro zvesimbi yemvura, etc. Izvi zvinotora chinzvimbo chinotungamira mukukandira kufa, kumhanya kwekuzadza, kuzadza hunhu uye kupisa zvinhu zve mold.
2.6Kushandiswa kwemaitiro matsva
Kuti ugadzirise dambudziko rekuvuza rezvikamu zvakasununguka mukati mezvikamu zvegearbox shell, mhinduro yekutonhora yealuminium block yakashandiswa kupayona mushure mekusimbiswa nemativi ese ekupa uye kudiwa.Iko ndiko kuti, chidimbu chealuminium chinotakurwa mukati mechigadzirwa chisati chazadza, sezvinoratidzwa mumufananidzo 9. Mushure mekuzadza nekusimbisa, iyi inopinza inoramba iri mukati mechikamu chechikamu kugadzirisa dambudziko rekuderera kwenzvimbo uye porosity.
Nguva yekutumira: Sep-08-2022